ESD protection For RESET pin of MC

Thread Starter

dileepchacko

Joined May 13, 2008
102
Dear All

I want a ESD protection of RESET pin of Micro controller(PIC micro controller). anybody help me for this account. I got a simple idea for this solution.but please suggest me any advanced protection method. see the attachment of ESD protection.
 

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SgtWookie

Joined Jul 17, 2007
22,210
What's in the schematic looks pretty good. The internal and external diodes clamp the pin's voltage from about Vss-0.7v to Vdd+0.7v. The capacitor helps by absorbing transients, even though the RC network is really for reset switch de-bouncing and setting a minimal time for the line to be held at a logic zero.

It really doesn't need anything else, unless you expect it to be in a very noisy environment. In that case, you could use a couple of Zener diodes back-to-back rated at Vdd less their Vf.
 

John Luciani

Joined Apr 3, 2007
477
Dear All

I want a ESD protection of RESET pin of Micro controller(PIC micro controller). anybody help me for this account. I got a simple idea for this solution.but please suggest me any advanced protection method. see the attachment of ESD protection.
Take a look at TVS (transient voltage suppresion) parts (try the Littelfuse website).
You also want a series resistance to limit current going into the pins.

(* jcl *)
 
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